CodeViewWidget: Fix memory leak

Per https://doc.qt.io/qt-6/qabstractitemview.html#setItemDelegateForColumn setItemDelegateForColumn does not take ownership of the parameter, so it was not being deleted. Specifying a parent to QObject (via QStyledItemDelegate's constructor) will allow it to automatically be deleted, per https://doc.qt.io/qt-6/objecttrees.html. The other instance of a QItemDelegate in IOWindow.cpp already used this.

Source/Core/DolphinQt/Debugger/CodeViewWidget.cpp

@@ -51,7 +51,7 @@ constexpr u32 WIDTH_PER_BRANCH_ARROW = 16;
 class BranchDisplayDelegate : public QStyledItemDelegate
 {
 public:
-  BranchDisplayDelegate(CodeViewWidget* parent) : m_parent(parent) {}
+  BranchDisplayDelegate(CodeViewWidget* parent) : QStyledItemDelegate(parent), m_parent(parent) {}
 
 private:
   CodeViewWidget* m_parent;